Treatment of chemical substances to prevent their deterioration or interaction with other bodies



45 achieved.

Patented June 14, 1932 UNITED STATES PATENT OFFICE ERNEST WALTER GEERE, OI BEGKENHAM, ENGLAND TREATMENT CHEMICAL SUBSTANCES TO PREVENT THEIR DETERIORATION OR o INTERACTION WITH OTHER BODIES No Drawing. Application filed December 21, 1926, Serial No. 156,257, and in Great Britain'Augusc 21, 1926.

" This my invention relates to the treatment of chemical substances such as acid phos- Mphates, acid sulphates, tartaric and citric acids and their acid salts, carbonates, and

g'any admixture of these, by incorporating them with a medium, such as oils, fats or waxes of varying softening and melting points. The objects of this my invention are to restrict to a predetermined time the chem- 1o ical action between any such substances and other bodies, to prevent any deterioration of such chemical substances and toovercome their hygroscopic character, by the control of the softening and melting, point of the i 2 mixed with the requisite amount of sodium bicarbonate and water, at ordinary temperatures of20' C. the reaction is retarded to such an extent as to be negligible; on increasing the temperature to the softening point of 2530 C. of the medium, the reaction commences, and as the temperature is raised to the melting point, so the reaction a is developed to the maximum. By increasing the melting point of the medium, the action can be still further retarded, and its speed governed by the softening and melting v I points.

This invention consists of combining oils, fats or waxes ofselected melting points, with i 4 acid phosphates, acid sulphates, tartaric and citric acids, and their acid salts, carbonates, and any admixture of these chemical substances, to" the extent of from 5% to 20%, whereby the objects of this invention are Such chemical substances can be treated ywith the desired medium during the later stages of manufacture, in the following known manners f 5 (a) By the use of edge runner mills.

(b) By spraying the chemical substances which are being treated with a molten medium in a sifting chamber. i V

(0) By first melting the medium in a vesselheated to a temperature a few degrees above the melting point of the medium used, and stirring in the chemical substance which is being treated, until a homogeneous mixture is secured.

I claim V The process of producing carbon dioxide, consisting in bringing acid substances, in crystalline form and admixed with and enveloped by a moisture resisting medium having a low melting point, in contact with a 05 carbonate, whereby the chemical reaction between said acid substances and said carbonate is controllable by the temperature to which said acids and said carbonate are subjected.

ERNEST WALTER GEERE. m 

